Skinny Silicone Jar Spatula: 600ºF Heat-Resistant Food-Grade 10in Long Narrow Sourdough Stirring Stick, Seamless Flexible Peanut Butter Spreader for Scraping Icing Bread Cream, Jam (Aqua Sky). [Firm & Flexible For Sourdough] Designed with the good balance of firmness and flexibility, this long handle jar spatula excels in the preparation of sourdough starters.